Merge pull request #107 from datacarpentry/describe-AMI

Describe AMI

Author: ErinBecker

_extras/guide.md

@@ -19,8 +19,9 @@ the bash shell). They will learn how to navigate their file system, computationa
 This lesson is meant to be taught in its entirety. For novice learners, schedule around 4 hours for this lesson. If your learners are 
 already somewhat familiar with the bash shell, the earlier episodes can be condensed. 
 
-## Technical tips and tricks
+This lesson uses data hosted on an Amazon Machine Instance (AMI). Instructors will be sent information on how to log-in to the AMI by the workshop coordinator a few days before the workshop. If you are running a self-organized workshop, register the workshop with our self-organized workshop form and send us an email at mailto:team@datacarpentry.org with information on how many people you expect to have at the workshop, and we'll start instances for you to use in the workshop. The day before the workshop, we'll send you the login information for your learners.
 
+## Technical tips and tricks
 
 ## Common problems
 

index.md

@@ -22,9 +22,9 @@ There are many reasons to learn about the shell.
 >
 > #### Prerequisites
 >
-> This lesson requires a working copy of a command line program or remote computing such as Amazon instances.
-> <br>To most effectively use these materials, please make sure to install 
-> everything *before* working through this lesson.
+> This lesson uses data hosted on an Amazon Machine Instance (AMI). Workshop participants will be given information on how
+> to log-in to the AMI during the workshop. Learners using these materials for self-directed study will need to set up their own
+> AMI. Information on setting up an AMI and accessing the required data is provided on the [Genomics Workshop overview page](http://www.datacarpentry.org/genomics-workshop/) under "Teaching Platform".
 {: .prereq}
 
 > ## For Instructors